linux-kernel - Re: 2.6.25-rc1 xen pvops regression

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Message-ID: <20080217063904.GE26206@mail.oracle.com>
Date:	Sat, 16 Feb 2008 22:39:04 -0800
From:	Joel Becker <Joel.Becker@...cle.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Jody Belka <lists-lkml@...b.org>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ian Campbell <ijc@...lion.org.uk>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andi Kleen <andi@...stfloor.org>,
	Mika Penttila <mika.penttila@...umbus.fi>
Subject: Re: 2.6.25-rc1 xen pvops regression

On Sat, Feb 16, 2008 at 10:46:23PM +1100, Jeremy Fitzhardinge wrote:
>>> What does this EIP correspond to in your kernel?  Also:
>>>
>>> c01687f0 c0417ab6 c040288f c040299a c0403270
>>>
>>> (as guesses of potential callers to try and work out a stack trace).
>>>     
>>
> (My usual technique is use "gdb vmlinux" and "x/i 0x...." to do the  
> lookup.) 

	Ok, my objdump didn't do a good job.  With gdb I get:

0xc04040bd <xen_set_pte_at+185>:	mov    %edi,(%eax)
0xc01687f0:	Cannot access memory at address 0xc01687f0
0xc0417ab6 <__set_fixmap+326>:	pop    %ecx
0xc040288f <xen_alloc_ptpage+41>:	lock btsl $0x8,(%eax)
0xc040299a <xen_load_idt+74>:	lock incb 0xc0766148
0xc0403270 <xen_set_pte_atomic+26>:	lock cmpxchg8b (%edi)

Joel

-- 

Life's Little Instruction Book #139

	"Never deprive someone of hope; it might be all they have."

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker@...cle.com
Phone: (650) 506-8127
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